one-lease-per-client... seriously

[Jeff Wieland]

Brian Rak wrote:
> I'm running into an issue where DHCPD (v4.3.4 and older versions) is 
> issuing multiple leases to the same mac address.  It appears to be 
> looking at the DHCP Client-ID field to determine what a unique client 
> is.  I'd much rather it ignore everything except for the client's mac 
> address, but I can't seem to find an option to do this.
>
> I already have:
>
> one-lease-per-client                                    true;
> deny duplicates;
>
> in my config, which doesn't seem to be helping.
>
> This is a problem, because I'm using DHCP for PXE booting, which means 
> each machine ends up getting three concurrent leases:
>
> one via the firmware built into the nic
> iPXE then gets chainloaded, and gets another lease
> the actual OS gets loaded, and gets a different lease
>
> It's very difficult to get these all to share leases, and I'd really 
> much rather handle this on the DHCP server side.  DNSMasq can do this, 
> but it doesn't scale well enough.
>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
>
I've not used it, but it looks like the ignore-client-uids statement 
might work.

--
Jeff Wieland, UNIX/Network Systems Administrator
Purdue University IT Infrastructure Services UNIX Platforms